#if 1
#include "stdio.h"

int main(){
	char *a = "Hello World";
	printf(":%10s:\n",a);
        printf(":%-10s:\n",a);
        printf(":%20s:\n",a);
        printf(":%-20s:\n",a);
        printf(":%20.10s:\n",a);
        printf(":%-20.10s:\n",a);
        printf(":%.10s:\n",a);
	printf("%s\n","very good!");
	return 0;
}
#endif
